Joseph reimers



(No Model.)

J. REIMBRS. COFFEE HULLER.

No. 541,250. Patented June 18, 1895.

INVENTOR.

ATTORNEYS.

M Wyn! ZZZ;

UNITED STATES PATENT CFFICE.

JOSEPH REIMERS, OF BUFFALO, NE vl YORK ASSIGNOR TO FRED. O. M.

LAUTZ, OF SAME PLACE.

HULLER.

SYECIFICATION forming part of Letters Patent No. 541,250, dated June 18, 1895.

Application filed April 10, 1895,

To aZZ whom it may concern.

Be it known that I, JOSEPH Ran/mas, a citizen of the United States, residing at Bufialo, in the county of Erie and State of New York, have invented a new and useful Improvement in Goffee-Hullers, of which the following is a specification.

This invention relates to that class of coffee hullers which comprise essentially a cas ing provided on its inner surface with teeth or corrugations forming a concave, and a rotary hulling drum or cone arranged in the casing and having spiral ribs which co'oper' ate with the concave.

My invention has for its objects to more effectually utilize the hulling surfaces of the drum and easing, so as to increase the capacity of the machine, and to retard the discharge of the coffee from the machine, by simple means, so as to subject the same for a longer period to the action of the hulling surfaces.

In the accompanying drawings,Figure 1 is a sectional elevation of my improved cofieehuller. Fig. 2 is a longitudinal section of the hulling-drum removed from the casing. Fig. 3 is a transverse section of the machine in line 3 3, Fig. 1.

Like letters of reference refer to like parts in the several figures.

A represents the casinghaving the usual conical or tapering form and provided with flanges a, whereby it is secured to a post B or other support. The casing is provided on its inner surface with the usual hulling teeth or corrugations a extending lengthwise of the case.

0 represents the feed hopper connected with the small end of the casing, and D the usual spiral conveyer arranged in the casing underneath the throat of the feed hopper.

E is the hulling drum, f the shaft upon which the drum and the conveyer D are mounted and which turns in bearings arranged on the front and rear heads 9 g of the casing, and H is the driving pulley.

The front or small portion of the hulling drum is preferably provided with the usual spiral ribs or corrugations ewhich receivethe coffee-beans from the conveyor D and whereby the same are subjected to a preliminary hulling action. The rear or large portion of the drum is provided with a spiral rib or flange e which extends around the surface of the drum in numerous convolutions from the rear ends of the preliminary ribs or corrugations e to the large end of the drum. The pitch of the rib-convolutions is comparatively small and the convolutions are arranged at a sufficient distance apart to permit the coffeebeans to move through the spiral channel or groove formed between the same. Each convolution is formed on opposite sides with teeth the spaces between the convolutions, so as to the surrounding casing or concave, the front faces of the projections being made abrupt, as shown, to more effectually propel the material. These teeth or projections are arranged alternately on opposite sides of each rib-convolution and preferably at regular intervals, and the spaces or faces e between the projections are arranged opposite the projectionsof the adjacent convolutions and are preferablyplain, as shown in Fig. 1. The contracted spaces between the projections and tions are of suflicient width to allow the coffee-beans to pass through the same.

The coffee'beans, upon reaching the large portion of the casing, enter the spaces between the spiral rib-convolutions and are carried around the interior of the casing or concave by the teeth or projections of the rib, thus utilizing all portions of the hulling surfaces of the drum and the concave, instead of the bottom portions thereof only, as is the case when the drum is provided from end to end with smooth spiral ribs, such as thepi'elimrnary hulling ribs e. A material increase in the capacity of the machine is thus effect-ed. The projections e of the rib-convolutions also serve to turn the coffee beans in propelling them around the concave, whereby all portions of the beans are subjected 'to the hulling action of the concave. By arranging the projections of each convolution opposite the spaces between the projections of the adjacent convolutions, a number of cotfee-beans cannot become wedged or crushed between the opposing faces of the adjacent convolu or projections e which extend laterally into carry the cotfee'beans around the interior of the rib-convolutions, and the beans are 211- ing, whereby the hulling action is rendered more efiective.

In the construction shown in the drawings, the automatic valve is pivoted at its upper portion to lugs or ears j projecting from the rear head of the casing, so as to be capable of swinging toward and from the discharge opening, and the valve is provided with an overhanging arm la upon which is hung a weight It. When the pressure of the material Within the casing overcomes the resistance of the valve, the latter opens and allows a portion of the material to escape, when it closes automatically and remains closed until the pressure is again sufficient to open it.

The drum is preferably provided at its large end with radial ribs Z whereby the material in the bottom of the casing is elevated to. the discharge opening I.

I claim as my invention- 1. The combination with the inclosing case, of a hulling drum arranged therein and having a spiral rib extending around the same and provided with propelling teeth or projections, the projections of each convolution of said rib being arranged opposite the spaces between the projections of the adjacent convolution, substantially as set forth.

2. The combination with the inclosing case and the hulling drum having a spiral rib extending around the same and provided on op; posite sides with teeth or projections having abrupt faces adapted to propel the cofiee beans around the interior of the casing, and between said projections with plain faces, the projections of each convolution of said spiral rib standing opposite the plain faces of the adjacent convolution or convolutious, substantially as set forth.

\Vitness my hand this 30th day of March, 1895.

JOSEPH REIMERS. 

